<div>
  
  <div>
    {
      this.props.title.map(function (item, index) {
        return (
          <div key={index} className={index + 1 <= _current ? 'step-item done' : 'step-item'} style={{ width: _width ? _width + 'px' : '' }}>
            <div className="step-title">{item}</div>
            <div className="step-body">
              <h3>{index + 1}</h3>
              <div className="step-line"></div>
            </div>
          </div>
        )
      })
    }
  </div>
</div>